Santoprene 8211-35 TPV | 38A High-Flow Natural Colorable TPV

描述

Santoprene 8211-35 is a soft, natural and colorable thermoplastic vulcanizate from Celanese designed for applications where low hardness and easy mold filling must be achieved at the same time.

Its key distinction is improved flow for easier processability.

This makes Santoprene 8211-35 especially useful in applications where a soft TPV must fill:

• Thin sections
• Narrow flow paths
• Small gates
• Detailed sealing geometries
• Multi-cavity molds
• Complex flexible parts

Current Celanese Product Finder data lists:

• 38 Shore A hardness
• Natural appearance
• 350% elongation at break
• 2.9 MPa tensile stress at break
• 1.0 MPa stress at 100% elongation
• Improved flow
• Enhanced colorability

Grade-specific Celanese data also gives:

• 0.930 g/cm³ density
• 10% compression set at 23°C / 24 h
• 36% compression set at 125°C / 70 h
• -65°C brittleness temperature

This combination makes Santoprene 8211-35 a strong candidate for soft, colorable and difficult-to-fill injection-molded parts.

For more TPV products, visit our TPV Thermoplastic Vulcanizates Product Category →.

For current Santoprene portfolio information, see the Official Celanese Santoprene & Geolast Product Finder →.

Key Features of Santoprene 8211-35

Typical Applications for Santoprene 8211-35

Santoprene 8211-35 is especially suitable for soft molded components that require easy filling and custom color capability.

Published application information identifies sealing, automotive grips, HVAC flapper-door seals, interior mats, weatherseals, soft-touch grips, mobile-device parts, seals and gaskets among relevant uses.

Typical Properties of Santoprene 8211-35

Physical Properties

The grade name contains 35, but the published measured hardness is approximately 38 Shore A.

Mechanical Properties

These values show that Santoprene 8211-35 is a very soft TPV with useful elastic recovery and strong flow behavior.

Improved Flow for Difficult Injection Molding

The strongest technical feature of Santoprene 8211-35 is its improved flow.

Soft elastomers can sometimes be difficult to process in molds with:

• Thin wall sections
• Long flow lengths
• Small gates
• Fine details
• Multiple cavities

Santoprene 8211-35 is specifically positioned to make these applications easier to process.

Improved flow can help:

• Reduce filling pressure
• Improve cavity filling
• Improve detail reproduction
• Reduce short shots
• Support thin flexible sections
• Improve multi-cavity balance

This is why the grade is better described as a high-flow soft TPV rather than simply a general-purpose 38A material.

Enhanced Colorability

Santoprene 8211-35 belongs to Celanese’s Enhanced Colorability TPV Grades.

Its natural formulation allows manufacturers to produce:

• White
• Gray
• Blue
• Red
• Green
• Beige
• Customer-specific colors

This is especially useful for:

• Consumer products
• Soft-touch grips
• Automotive interior components
• Appliances
• Visible technical parts

Color masterbatch should be compatible with TPV and evaluated for:

• Dispersion
• Surface finish
• Mechanical-property retention
• Flow
• Thermal stability

Soft-Touch Performance

At approximately 38 Shore A, Santoprene 8211-35 provides a soft tactile response.

This makes the grade useful for:

• Hand-contact surfaces
• Soft grips
• Protective interfaces
• Flexible covers
• Cushioned contact areas

The combination of softness and high flow also allows the material to be molded into relatively fine soft-touch features.

Compression-Set Performance

Compression-set data includes:

• 10% at 23°C / 24 h
• 36% at 125°C / 70 h

The room-temperature result is particularly useful for soft seals and gaskets that must recover after prolonged compression.

Potential applications include:

• Housing seals
• Gaskets
• HVAC seals
• Flexible interfaces
• Soft sealing lips

Low-Temperature Flexibility

Santoprene 8211-35 has a published brittleness temperature of approximately:

-65°C

This indicates useful flexibility under cold conditions.

Potential application environments include:

• Winter automotive use
• Cold-storage equipment
• Outdoor consumer products
• Industrial seals
• Flexible protective parts

Brittleness temperature should be used as comparative material data rather than a guaranteed continuous-service limit.

Ozone Resistance

Santoprene 8211-35 is recommended for applications requiring excellent ozone resistance.

This is useful for flexible parts exposed to:

• Outdoor atmosphere
• Electrical equipment
• Long-term air exposure
• Repeated strain

Ozone resistance helps reduce cracking in elastomeric components exposed to environmental aging.

Flex-Fatigue Resistance

The grade is also recommended for applications requiring excellent flex-fatigue resistance.

This makes it relevant to parts exposed to repeated:

• Bending
• Stretching
• Folding
• Compression
• Recovery

Potential uses include:

• Flexible sealing lips
• HVAC components
• Grips
• Protective interfaces
• Repeated-motion consumer parts

Chemical Resistance

Santoprene 8211-35 provides good resistance to many common chemicals.

This supports applications involving:

• Water
• Cleaning agents
• Detergents
• Aqueous solutions
• Selected oils and fluids

Final compatibility should always be evaluated using the exact chemical, concentration, temperature and exposure duration.

Why Choose Santoprene 8211-35?

The real value of Santoprene 8211-35 is the combination of softness, easier processing and colorability.

Its strongest points are:

• 38 Shore A
• Improved flow
• Enhanced colorability
• Natural appearance
• 350% elongation
• 2.9 MPa tensile stress at break
• 1.0 MPa @100% elongation
• 10% room-temperature compression set
• -65°C brittleness temperature
• Non-hygroscopic behavior
• Excellent ozone resistance
• Excellent flex-fatigue resistance

For applications where a soft TPV is difficult to fill into complex molds, Santoprene 8211-35 is particularly relevant.

Processing Guidelines for Santoprene 8211-35

Current grade-specific Celanese processing data gives:

These are current grade-specific values from the 2025 Celanese Materials Database.

Drying & Moisture Control

Although Santoprene 8211-35 is described as non-hygroscopic, Celanese’s current processing sheet still recommends drying at:

80°C for at least 3 hours

with processing moisture controlled to:

≤0.08%

This is the better value to place on the product page because it is grade-specific and current.

Melt Temperature

The recommended melt-temperature range is:

185–215°C

with approximately:

200°C optimum

This gives a practical starting point for injection-molding trials.

Because Santoprene is shear dependent, processors should avoid relying only on temperature to improve flow.

Mold Temperature

The recommended mold-temperature range is:

20–50°C

with approximately:

35°C optimum.

Mold temperature influences:

• Surface appearance
• Filling
• Cooling
• Part release
• Cycle time

High-Flow Molding Strategy

For difficult geometries, flow can often be improved using:

• Faster injection
• Appropriate gate size
• Balanced runner design
• Sufficient screw speed
• Good mold venting

The improved-flow formulation helps the material fill detailed components without requiring excessive melt temperature.

Shear-Dependent Flow

Santoprene 8211-35 is shear dependent.

As shear rate increases, apparent viscosity decreases.

This behavior is particularly useful for:

• Thin sections
• Small gates
• Sealing lips
• Long flow paths
• Multi-cavity molds

The material’s flow is therefore influenced strongly by:

• Injection speed
• Screw speed
• Gate geometry
• Runner design

Multi-Injection Molding

Santoprene 8211-35 supports multi-injection molding.

This allows it to be considered for:

• Soft-touch areas
• Integrated flexible sections
• Multi-material consumer parts
• Selected automotive components

However, it is not a dedicated chemically bondable grade like B100 or B150 materials.

Adhesion to a rigid substrate should be validated using the exact substrate resin.

Extrusion & Blow Molding

Published processing routes also include:

• Profile extrusion
• Sheet extrusion
• Extrusion blow molding
• Injection blow molding

This broadens the application range beyond conventional injection molding.

Potential products include:

• Flexible profiles
• Sealing sections
• Flexible sheets
• Hollow flexible parts

Thermoforming & Vacuum Forming

Santoprene 8211-35 can also be used for:

• Thermoforming
• Vacuum forming

This allows flexible sheet-based designs to be formed into more complex geometries.

OEM Specifications

Current Celanese material data lists the following OEM references for Santoprene 8211-35:

These references are useful for customers working with existing automotive specifications. Current project-specific approval should still be confirmed against the required specification revision.

Material Compatibility

Santoprene TPV processing equipment should be properly purged when changing from incompatible polymers.

Special care should be taken around:

• POM / Acetal
• PVC

Proper purging reduces the risk of:

• Processing instability
• Surface defects
• Contamination
• Color inconsistency

Manufacturing-Stream Recyclability

Santoprene 8211-35 is polyolefin based and recyclable within the manufacturing stream.

Current processing guidance permits approximately:

20% maximum regrind

as a starting reference.

Possible clean scrap includes:

• Sprues
• Runners
• Start-up material
• Selected rejected molded parts

For light or custom-colored parts, contamination and color shift should also be monitored.

Related Products

We supply Santoprene TPV grades for different flow, hardness, colorability and processing requirements.

Typical product families include:

• Santoprene 8211 Series
• Santoprene high-flow TPV
• Santoprene enhanced-colorability TPV
• Santoprene soft TPV
• Santoprene injection-molding grades
• Santoprene sealing grades
• Santoprene consumer-product TPV
• Santoprene automotive interior grades

View More TPV Thermoplastic Vulcanizates →

Technical Documents for Santoprene 8211-35

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FAQ About Santoprene 8211-35

Q1: What is Santoprene 8211-35?

Santoprene 8211-35 is a soft, natural, colorable and improved-flow TPV from Celanese designed for easier processing in difficult injection-molding applications.

Q2: What is the hardness of Santoprene 8211-35?

The published typical hardness is approximately 38 Shore A.

Q3: Is Santoprene 8211-35 exactly 35 Shore A?

No. The grade name contains 35, while current measured typical hardness is approximately 38 Shore A.

Q4: What is the density?

The typical density is approximately 0.930 g/cm³.

Q5: What is the tensile stress at break?

The typical value is approximately 2.9 MPa.

Q6: What is the elongation at break?

The typical value is approximately 350%.

Q7: What is the stress at 100% elongation?

The typical value is approximately 1.0 MPa.

Q8: What is the compression set?

Published grade-specific values include approximately 10% at 23°C / 24 h and 36% at 125°C / 70 h.

Q9: Is Santoprene 8211-35 high flow?

Yes. Celanese specifically positions the 8211 series as Improved Flow for Easier Processability.

Q10: Can Santoprene 8211-35 be colored?

Yes. It belongs to the Enhanced Colorability family and is supplied in a Natural formulation.

Q11: Is Santoprene 8211-35 non-hygroscopic?

Yes. Celanese describes it as non-hygroscopic.

Q12: Does Santoprene 8211-35 need drying?

Current grade-specific Celanese processing guidance recommends 80°C for at least 3 hours and moisture ≤0.08%.

Q13: Can Santoprene 8211-35 be used for seals?

Yes. Sealing applications are specifically included in the grade positioning.

Q14: What is the low-temperature brittleness?

The published value is approximately -65°C.

Q15: What melt temperature should be used?

Current grade-specific guidance gives approximately 185–215°C, with 200°C optimum.

Q16: What mold temperature is recommended?

The current range is approximately 20–50°C, with 35°C optimum.

Request Santoprene 8211-35 Price & Technical Support

For pricing, availability or technical support for Santoprene 8211-35, please provide:

• Required quantity
• Destination country or port
• Application
• Required color
• Soft-touch or sealing requirement
• Thin-wall or difficult-fill geometry
• Injection-molding process
• Part dimensions
• Operating temperature
• Low-temperature requirement
• OEM specification, if applicable
• TDS / SDS requirement
• COA requirement
• Sample requirement, if applicable

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